Which expression is equivalent to −4.6+(−0.4)+(−7.2) ? (4.6+0.4+7.2) −4.6−(0.4+7.2) (4.6+0.4)+(−7.2) −(4.6−0.4)+(−7.2)
1 answer:
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Answer:
<h2>x = 117°</h2>Step-by-step explanation:
We know:
The sum of the quadrilateral angles measures 360°.
Therefore we have the equation:
The sum of angles x and D is equal to 360°. Therefore we have the other equation:
From (1) and (2) we have: